Ect (Engine Coolant Temp.) - Ford 6.0L POWER STROKE Service Procedures And General Diagnostics

E L E C T R I C A L C O M P O N E N T S

ECT (Engine Coolant Temp.)

• The ECT sensor is a two (2) wire
thermistor sensor.
• The PCM supplies a 5 volt
reference signal which the ECT
sensor uses to produce an analog
voltage.
• The ECT sensor changes
resistance when exposed to
different temperatures.
• When the temperature of the
coolant decreases, the resistance
of the thermistor increases and the
signal voltage increases.
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• When the temperature of the
coolant increases, the resistance of
the thermistor decreases and the
signal voltage decreases.
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